Try to use Python integers

Author: user202729

src/sage/doctest/util.py

@@ -817,7 +817,9 @@ def ensure_interruptible_after(seconds: float, max_wait_after_interrupt: float =
     The test above requires a large tolerance, because both ``time.sleep`` and
     ``from posix.unistd cimport usleep`` may have slowdown on the order of 0.1s on Mac,
     likely because the system is idle and GitHub CI switches the program out,
-    and context switch back takes time. So we use busy wait instead::
+    and context switch back takes time. Besides, there is an issue with ``Integer``
+    destructor, see `<https://github.com/sagemath/cysignals/issues/215>`_
+    So we use busy wait and Python integers::
 
         sage: # needs sage.misc.cython
         sage: cython(r'''
@@ -841,17 +843,17 @@ def ensure_interruptible_after(seconds: float, max_wait_after_interrupt: float =
         ....:         if start_time.tv_sec > target_time.tv_sec or (start_time.tv_sec == target_time.tv_sec and start_time.tv_nsec >= target_time.tv_nsec):
         ....:             break
         ....: ''')
-        sage: with ensure_interruptible_after(2) as data: interruptible_sleep(1)
+        sage: with ensure_interruptible_after(2) as data: interruptible_sleep(1r)
         Traceback (most recent call last):
         ...
         RuntimeError: Function terminates early after 1.00... < 2.0000 seconds
-        sage: with ensure_interruptible_after(1) as data: uninterruptible_sleep(2)
+        sage: with ensure_interruptible_after(1) as data: uninterruptible_sleep(2r)
         Traceback (most recent call last):
         ...
         RuntimeError: Function is not interruptible within 1.0000 seconds, only after 2.00... seconds
         sage: data  # abs tol 0.01
         {'alarm_raised': True, 'elapsed': 2.0}
-        sage: with ensure_interruptible_after(1): uninterruptible_sleep(2); raise RuntimeError
+        sage: with ensure_interruptible_after(1): uninterruptible_sleep(2r); raise RuntimeError
         Traceback (most recent call last):
         ...
         RuntimeError: Function is not interruptible within 1.0000 seconds, only after 2.00... seconds
@@ -870,7 +872,7 @@ def ensure_interruptible_after(seconds: float, max_wait_after_interrupt: float =
     seconds = float(seconds)
     max_wait_after_interrupt = float(max_wait_after_interrupt)
     inaccuracy_tolerance = float(inaccuracy_tolerance)
-    # use Python float to avoid unexplained slowdown with Sage objects
+    # use Python float to avoid slowdown with Sage Integer (see https://github.com/sagemath/cysignals/issues/215)
     data = {}
     start_time = walltime()
     alarm(seconds)